EP 4235267 A3 20231220 - MULTI KW CLASS BLUE LASER SYSTEM
Title (en)
MULTI KW CLASS BLUE LASER SYSTEM
Title (de)
BLAUES LASERSYSTEM MIT MULTIKILOWATT-KLASSE
Title (fr)
SYSTÈME LASER BLEU DE CLASSE MULTI-KW
Publication
Application
Priority
- EP 18872280 A 20181101
- US 2018058784 W 20181101
- US 201762580419 P 20171101
Abstract (en)
The invention may be embodied in other forms than those specifically disclosed herein without departing from itMulti-kW-class blue (400-495 nm) fiber-delivered lasers and module configurations. In embodiments, the lasers propagate laser beams having beam parameter products of < 5 mm*mrad, which are used in materials processing, welding and pumping a Raman laser. In an embodiment the laser system is an integration of fiber-coupled modules, which are in turn made up of submodules. An embodiment has sub-modules having a plurality of lensed blue semiconductor gain chips with low reflectivity front facets. These are locked in wavelength with a wavelength spread of < 1 nm by using volume Bragg gratings in an external cavity configuration. An embodiment has modules having of a plurality of submodules, which are combined through wavelength multiplexing with a bandwidth of < 10 nm, followed by polarization beam combining. The output of each module is fiber-coupled into a low NA fiber. In an embodiment a kW-level blue laser system is realized by fiber bundling and combining multiple modules into a single output fiber.
IPC 8 full level
H01S 5/323 (2006.01); G02B 27/20 (2006.01); H01S 3/08 (2023.01); H01S 5/022 (2021.01); H01S 5/14 (2006.01); H01S 5/40 (2006.01); H01S 5/42 (2006.01)
CPC (source: EP KR RU)
G02B 6/4215 (2013.01 - EP KR); G02B 6/4249 (2013.01 - EP KR); G02B 6/4269 (2013.01 - KR); G02B 6/4296 (2013.01 - EP KR); H01S 3/0812 (2013.01 - KR); H01S 3/0815 (2013.01 - KR); H01S 5/02216 (2013.01 - KR); H01S 5/02251 (2021.01 - KR); H01S 5/02326 (2021.01 - KR); H01S 5/06 (2013.01 - RU); H01S 5/141 (2013.01 - EP KR); H01S 5/32341 (2013.01 - KR); H01S 5/4012 (2013.01 - EP KR); H01S 5/4062 (2013.01 - EP KR); H01S 5/4068 (2013.01 - KR); G02B 6/4269 (2013.01 - EP); H01S 3/0812 (2013.01 - EP); H01S 3/0815 (2013.01 - EP); H01S 5/02216 (2013.01 - EP); H01S 5/02251 (2021.01 - EP); H01S 5/02326 (2021.01 - EP); H01S 5/32341 (2013.01 - EP); H01S 5/4068 (2013.01 - EP)
Citation (search report)
- [A] US 2017271837 A1 20170921 - HEMENWAY DAVID MARTIN [US], et al
- [A] US 2015131692 A1 20150514 - HAYAMIZU NAOKI [JP], et al
Designated contracting state (EPC)
AL AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MK MT NL NO PL PT RO RS SE SI SK SM TR
DOCDB simple family (publication)
WO 2019089983 A1 20190509; CN 111512507 A 20200807; EP 3704772 A1 20200909; EP 3704772 A4 20211103; EP 3704772 B1 20230510; EP 4235267 A2 20230830; EP 4235267 A3 20231220; FI 3704772 T3 20230731; JP 2021506100 A 20210218; JP 2022062216 A 20220419; JP 2024024010 A 20240221; JP 7080971 B2 20220606; JP 7414867 B2 20240116; KR 102425945 B1 20220727; KR 102617183 B1 20231221; KR 20200083499 A 20200708; KR 20220110597 A 20220808; KR 20240001719 A 20240103; RU 2756788 C1 20211005
DOCDB simple family (application)
US 2018058784 W 20181101; CN 201880083044 A 20181101; EP 18872280 A 20181101; EP 23169967 A 20181101; FI 18872280 T 20181101; JP 2020523812 A 20181101; JP 2022019295 A 20220210; JP 2023222198 A 20231228; KR 20207014148 A 20181101; KR 20227025613 A 20181101; KR 20237043857 A 20181101; RU 2020117750 A 20181101